Pinking machine



N. LEViNE PINKING MACHINE Filed Nov. 16. 1922 2 Sheets-Sheet 1 INVENTOR.

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ATTORNEY.

A ril 8 1924. 1,489,891

N. LEViNE PINKING MACHINE Filed Nov. 16, 1922 2 Sheets-Sheet 2 7 v Y J840 INVEN TOR.

ATTORNEY.

Patented Apr. 8,1924.

NATHAN LEVINE, OF ROXBURY, MASSACHUSETTS.

PINKING MACHINE.

Application filed November 16, 1922. Serial No. 601,280.

To all whom it may concern:

Be it known that I, NATHAN LEVINE, a citizen of the United States, and resident of Roxbury, in the county of Suffolk and Stateprovide a mechanism that can be actuated by the sewing machine to which it is attached and more particularly by the needle operating bar of such sewing machine.

A further object of the invention is the provision of adjusting means for the mechanism whereby the latter is made more flexible and adapted to treat various materials and meet various operating conditions.

Other objects and advantages which might hereinafter appear are attained by the em odiment of the lnvention in the mechanism of which the preferred form is hereinafter described in connection with the accompanying drawingsin which:

Fig. 1 is an end elevation of the mechanism embodying my invention applied to a sewing machine of any usual type;

Fig. 2 is a side elevational viewtaken from the left hand side of Fig. 1;

Fig. 3 is a plan sectional view on the line 33 ofFig. 2;

Fig. 4 is a side view, partly broken away, of the cutter and cutter actuating means, with the sewing machine needle operating bar in one position;

Fig. 5 is a view similar to Fig. 4 but shows the parts with the needle operating bar in another position;

- Fig. 6 is a detail end view of the cutter and its actuating means, showing how these parts are mounted for rotation; and

Fig. 7 is a sectional detail of the combined clamp and actuator attached to the needle bar on the line 77 of Fig. 5.

Referring to the drawings in detail 10 indicates the head of an ordinary stitching machine in which is supported and operatively mounted the needle operating bar or chuck 11 in which is secured the needle 12.

. Securedto the cloth plate 13 of the stitching machine is the base plate 14 of the mechanism embodying my invention. This base plate 14 is provided with the cross slots 15 and 16 adapted to receive the headed screw 17 which is threadedinto an opening 18 in the cloth plate 13. To permit of levelling the base plate 14 when necessary because of the condition of the stitching machine cloth plate there are provided screws 19, 20 and 21 which bear on the surface of the cloth plate and are adjustable in the base plate 14, as will easily be understood.

The base plate 14 is provided with a cross bar 22 to which is secured the bearing pin 23- on which is journalled the arm 24 having integral therewiththe standard 25 and the projection 26. In the pivoted arm 24, near the standard 25 and the projection 26, there is secured the bearing pin 27 on which is rotatably mounted the cutter or pinking wheel 28 and the ratchet wheel 29, the former being secured to the latter. by the pin 30. The construction of the pinking wheel having the periphery of such contour as to give a piece of cloth or other material a scalloped or pinked edge is clearly shown by the drawings and needs no further description. The standard 25 is provided with the projecting pin 31 which acts as a fulcrum for the lever 32 having at one end the pivot pin 33 and at its opposite end the slotted opening 34. On the 1vot pin 33 is mounted the pawl 35 whic co-operates with the ratchet wheel 29, as clearly shown by Figs. 4 and 5. The pawl 35 is held in contact with the ratchet 29 by means of thespring 36 having one end secured to the arm projection 26 and the other end to the pawl 35.

It will thus be understood that upon 0s- -cillation of the lever 32, the pawl 35 will rotate the ratchet wheel 29 and therewith the pinking wheel 28 step by step. As a convenient and advantageous means for oscillating the lever 32 to thereby cause rotation of the pinking wheel 28, I have provided a combined clam and operating bar which may be very easily attached to the needle operating bar 11 of the stitching machine so that the reciprocation of the needle bar causes the lever 32 to oscillate as desired. The clamp designated generally by the reference character 37 comprises the two straps 38 and 39 which embrace the needle bar 11 and are clamped thereto by the screws 40. The strap 39 .has integral therewith the short lug or operating bar 41 which is received in the slot 34 to thereby actuate the lever 32. The construction of the clamp 37 is shown more clearly by Fig. 7, and while the specific construction of this part is il lustrated it will be understood that it may be of difierent construction especially when applied to stitching machines having needle operating bars of other designs.

(lo-operating with the cutting element or pinking wheel 28. there is provided the circular plate 42 which is journalled on the pin 43 secured from turnin in the cross bar 22 by the set screw 44. xtending upwards from the base plate 14 and passing through an opening 45 in the arm 24 is an upright post 46 having its upper end screw threaded to receive the adjustable abutment 47 for the upper end of the spring 48 the lower end of which exerts its pressure on the arm 24. It will thus be seen that in order to regulate the pressure with which the pinking wheel 28 bears on the plate 42, the compression of the spring 48 is varied by rotating the adjustable abutment 47. As a further means of regulating the contact between the 'pinking wheel 28 and the plate 42, there is shown the adjusting screw 49 in threaded engagement with the arm projection 26 and designed to bear on the plate 42. To provide a guide 50 for the cloth or other material fed to the pinking wheel, the base plate 14 is extended beyond the post 46and to a point beyond the front end of the base plate as clearly shown b Fig. 3.

The operation 0 the device will be understood from the above description. The device-will preferably be secured to the cloth plate in the position shown so that the pinking wheel is behind the stitching needle so that as the cloth or other material designatedby the numeral 51 is stitched at 52 it can during the same operationbe pinked as shown at 53 in Fig. 3. As previously ex-. plained, the reciprocation of the stitching machine needle barand the consequent movement of the operating bar 41 causes the lever 32 to actuate the pawl 35, the

ratchet wheel 29 and thereby the pinking jwheel 28 which being in. frictionalcontact with the plate 42 rotates the latter. The cloth fed to the pinking device comprising the pinking wheel and the plate will be automatically drawn therethrough by reason of the rotary contact between these two members.

From the above description, it will be understood that I have provided a device that is very simple and one that can be very conveniently attached to sewing machines of any of the well known types without any change in the existing structure of such machines. By so attaching the pinking machine to a sewing machine, a great saving in time and labor is effected because the cloth or other material may be pinked during the stitching operation. While I have shown and described the preferred form of my invention, it will be apparent to those skilled in the art, in View of my disclosure, that certain changes in the construction and arrangement of the parts may be made without departing from my invention and therefore I do not wish to be limited to the exact description and illustration except within the scope of the appended claims.

Having thus described my invention in detail, what I claim as new is:

'1. A' pinking device comprising a base, an arm pivoted to said base, a cutting wheel rotatably molmted on said arm, a plate rotatably mounted on said base, spring means associated with said base and said arm for resiliently holding said wheel in contact with said plate, and means for rotating said cutting wheel.

2,. In combination with the needle operating bar of a sewing machine, .a cutting wheel, and means operated by saidneedle bar for rotating said cutting wheel.

3. In combination with the needle operating bar of a sewin machine, a cutting wheel, pawl and ratchet means for rotating said cutting wheel, and means actuated by said needle bar for operating said pawl and ratchet means.

In testimony whereof, I hereunto affix my signature this tenth day of November, 1922.

NATHAN LEVINE. 

